Research Status and Key Technologies of Geo-Electromagnetic Magnetic Induction Sensor  

作　　者：Yanzhang Wang Yunxia Wan Chen Chen Hongyu Shi Jun Lin Defu Cheng 

机构地区：[1]Key Laboratory of Geo-Exploration Instrumentation,Ministry of Education,Jilin University [2]College of Instrumentation & Electrical Engineering,Jilin University

出　　处：《Journal of Harbin Institute of Technology(New Series)》2017年第4期38-49,共12页哈尔滨工业大学学报（英文版）

基　　金：Sponsored by the National Natural Science Foundation of China(Grant No.41274183);the Science and Technology Department of Jilin Province(Grant No.20150520095JH)

摘　　要：According to different applications,the performance parameters of the several Geo-Electromagnetic Magnetic Induction Sensors( GEMISs) which are the most representative in the world are compared. After discussing the several key technologies for improving the performance of GEMISs,the main conclusions are as follows: the application bandwidth can be expanded by adopting flux negative feedback( 1 m Hz-10 k Hz);"laminated"core structure is useful for suppressing eddy current loss; the effective permeability of the core has increased observably after adding flux concentrators to the two ends of the core; the chopper amplifier is a useful method to suppress 1/f noise for reducing the GEMIS's output noise; the indoor calibration scheme based on"long straight solenoid"proposed to obtain sensor sensitivity. Accordingly,the problem how to reduce the noise of GEMIS is urgent need to be solved,which will improve the performance of GEMIS. And there is plenty of work requires further study on parameters ' optimization of coil and core. In the future,miniaturization,intelligence and three-axis measurement are the development directions of GEMIS.According to different applications,the performance parameters of the several Geo-Electromagnetic Magnetic Induction Sensors( GEMISs) which are the most representative in the world are compared. After discussing the several key technologies for improving the performance of GEMISs,the main conclusions are as follows: the application bandwidth can be expanded by adopting flux negative feedback( 1 m Hz-10 k Hz);'laminated'core structure is useful for suppressing eddy current loss; the effective permeability of the core has increased observably after adding flux concentrators to the two ends of the core; the chopper amplifier is a useful method to suppress 1/f noise for reducing the GEMIS's output noise; the indoor calibration scheme based on'long straight solenoid'proposed to obtain sensor sensitivity. Accordingly,the problem how to reduce the noise of GEMIS is urgent need to be solved,which will improve the performance of GEMIS. And there is plenty of work requires further study on parameters ' optimization of coil and core. In the future,miniaturization,intelligence and three-axis measurement are the development directions of GEMIS.

关 键 词：GEMIS key technologies FLUX NEGATIVE feedback “Laminated” corestructure FLUX CONCENTRATORS 

分 类 号：P319.31[天文地球—固体地球物理学]